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The value of tan(–405°) is :

A. 1

B. –1

C. ∞

D. 0

AD

BB

CA

DC

Answer:

B. B

Read Explanation:

Solution: Formula: tan(–ϴ) = – tan ϴ and tan (360° + ϴ) = tan ϴ ∴ tan(–405°) = – tan 405° = – tan(360° + 45°) = – tan 45° = – 1

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$cosec\theta=?$

The value of cosec230∘sin⁡245∘+sec⁡260∘tan60∘cosec245∘−sec⁡260∘tan45∘\frac{{\rm cose{c^2}30^\circ {{\rm \sin }^2}45^\circ + {{\rm \sec }^2}60^\circ }}{{\rm tan60^\circ \rm cose{c^2}45^\circ - {{\rm \sec }^2}60^\circ \rm tan45^\circ }}  is:

image.png
image.png

AB = 10cm, BC = 8cm, ∠CAB = 30 എന്ന ത്രികോണത്തിന്റെ വിസ്തീർണ്ണം കണ്ടെത്തുക

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