Find the value of:

(i) sin 75°

(ii) tan 15°

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Solution

(i) sin 75° = sin (45° + 30°)

= sin 45° cos 30° + cos 45° sin 30°

[sin (x + y) = sin x cos y + cos x sin y]

(ii) tan 15° = tan (45° – 30°)

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Similar questions

sin 75^{o}

tan 15^{o}

Find the value of:

(i) 2⁶ (ii) 9³

(iii) 11² (iv)5⁴

\sqrt{784} = 28

\sqrt{7.84} + \sqrt{78400}

\sqrt{0.0784} + \sqrt{0.000784}

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