Question

निम्नलिखित के मूल्य ज्ञात करें।
(1) sin 30°. cos 45° + cos 30° sin 45°
(ii) cosec2 30°. tan2 45° - sec2 60°
(iii) 2 sin2 30 tan 60° - 3 cos2 60° - sec2 30°
(iv) tan 60° - cosec2 45° + sec2 60°. tan 45°
(v) tan 30° sec 45° + tan 60° . sec 30
(vi) cos 30°- cos 45° - sin 30° - sin 45°

Answer 1

First of all you should know some of the values of the trigonometric ratios.

sin 30° = 1/2

tan 60° = root3

cos 60°= 1/2

sec 30° = 2/root 3

cosec 45°= Root2

sec 60° = 2

tan 45°= 1

tan 30°= 1/ root3

sec 45°= root2

cos 30°= root3 /2

sin 45° = 1/root2

These are all the ratios you would require to solve these questions.

The answers are in the attachment.

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