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1) Evaluate : 3 tan 25 …

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1) Evaluate : 3 tan 25 degree. tan 40 degree . tan 50 degree. tan 65 degree 1/2 tan square 60 degree/4(cos square 29 degree + cos square 61 degree)

Posted by Goldy Singh 7 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Shruti Tripathi 7 years, 3 months ago

Ans.9/8 only ans. All solution right

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Shruti Tripathi 7 years, 3 months ago

Solution 3tan(90°-65°).tan(90°-50°).1/cot50°.1/cot65°.1/2.tan square60° /4(cos square (90°-61°)+cos square 61°) 3×1/2×✓3 square /4(sin square 61°+cos square 61°) 3/2×3 /4(1) 9/2 /4 9/2×4 18 ans.

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CBSE > Class 10 > Mathematics