Solve the equation
4 + 7cosx = 0     for 0° ≤x≤ 360°

Find the value of -sin78.5°

Find the value of sin 145°

Find the value of
cosec 90°

Given that

tanx = 5/12,

what is the value of sinx + cosx?

PQRS is a quadrilateral with dimensions shown below



Calculate the size of <PSR

If sin 49° = 3/4, find the value of sin 581°.

If sin A + cos A = 7/5 and sin A cos A =12/25, find the values of sin A and cos A

Without using tables, find the value of

Find the value of

4/3 tan<span id="MathJax-Element-5-Frame" class="MathJax" style="font-style: normal;font-weight: 400;line-height: normal;font-size: 15px;text-indent: 0px;text-align: left;text-transform: none;letter-spacing: normal;float: none;direction: ltr;max-width: none;max-height: none;min-width: 0px;min-height: 0px;border: 0px;padding: 0px;margin: 0px;color: #000000;font-family: Verdana, Geneva, sans-serif;background-color: #ffffff" role="presentation" data-mathml="2">²60° + 3 cos<span id="MathJax-Element-6-Frame" class="MathJax" style="font-style: normal;font-weight: 400;line-height: normal;font-size: 15px;text-indent: 0px;text-align: left;text-transform: none;letter-spacing: normal;float: none;direction: ltr;max-width: none;max-height: none;min-width: 0px;min-height: 0px;border: 0px;padding: 0px;margin: 0px;color: #000000;font-family: Verdana, Geneva, sans-serif;background-color: #ffffff" role="presentation" data-mathml="2">²30° - 2 sec<span id="MathJax-Element-7-Frame" class="MathJax" style="font-style: normal;font-weight: 400;line-height: normal;font-size: 15px;text-indent: 0px;text-align: left;text-transform: none;letter-spacing: normal;float: none;direction: ltr;max-width: none;max-height: none;min-width: 0px;min-height: 0px;border: 0px;padding: 0px;margin: 0px;color: #000000;font-family: Verdana, Geneva, sans-serif;background-color: #ffffff" role="presentation" data-mathml="2">²30° - 3/4 cot<span id="MathJax-Element-8-Frame" class="MathJax" style="font-style: normal;font-weight: 400;line-height: normal;font-size: 15px;text-indent: 0px;text-align: left;text-transform: none;letter-spacing: normal;float: none;direction: ltr;max-width: none;max-height: none;min-width: 0px;min-height: 0px;border: 0px;padding: 0px;margin: 0px;color: #000000;font-family: Verdana, Geneva, sans-serif;background-color: #ffffff" role="presentation" data-mathml="2">²60°

PQRS is a quadrilateral in which, PS is parallel to QR. PQ = 16cm, SR = 15 cm and angle QPS = 60° and angle PSQ = 44°.
Calculate /QS/

If sec θ = 17/8 and θ is a positive acute angle, find the value of csc θ using Pythagoras theorem.

Without using trigonometric tables, evaluate <span id="MathJax-Element-10-Frame" class="MathJax" style="font-style: normal;font-weight: 400;line-height: normal;font-size: 15px;text-indent: 0px;text-align: left;text-transform: none;letter-spacing: normal;float: none;direction: ltr;max-width: none;max-height: none;min-width: 0px;min-height: 0px;border: 0px;padding: 0px;margin: 0px;color: #000000;font-family: Verdana, Geneva, sans-serif;background-color: #ffffff" role="presentation" data-mathml="tan65°cot25°">tan65°/cot25°

Find the value of tan (-84)°

Solve the equation
8 sin x = 3     for 0° ≤x≤ 360°

In the diagram below , WXYZ is a cyclic quadrilateral in which WZ = 6cm, ZY = 8.5cm and the diagonal WY = 10 cm. If XW = XY, calculate <XYW

The sine of an angle is given as -0.8065 and its tangent is positive. If the angle lies between 0°  and 360° , find the angle

Given that

sin(θ+α) = sinθcosα + cosθsinα,
find the value of sin 75°

If tanx = 12/5,

find the value of sinx, 0° ≤ x ≤ 90°

If tan θ + sec θ = 2/√3 and θ is a positive acute angle, find the value of sin θ.

Find the value of
sin 225°

Write the value of the angle in surd form cos 300°

Find the values of cot (- 855°)

If sin x = 12/13,
where 0° < x < 90°,
find the value of 1 - cos²x.

If 5 cot θ = 3, find the value of (5 sin θ - 3 cos θ)/(4 sin θ + 3 cos θ)