CosA=2/5 find the value 4+4tan^A
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COSA = 2/5 = B/H
B = 2 , H = 5 , P = ?
WE KNOW THAT,
(H)² = (B)² + (P)²
(P)² = (H)² - (B)²
= (5)² - (2)²
= 25-4 = 21
P² = 21
P = ✓21.
THEREFORE,
TANA = P/B = ✓21/2
4+4TANA = 4+4×✓21/2 = 4+4✓21/2 = 4+2✓21 Ans
B = 2 , H = 5 , P = ?
WE KNOW THAT,
(H)² = (B)² + (P)²
(P)² = (H)² - (B)²
= (5)² - (2)²
= 25-4 = 21
P² = 21
P = ✓21.
THEREFORE,
TANA = P/B = ✓21/2
4+4TANA = 4+4×✓21/2 = 4+4✓21/2 = 4+2✓21 Ans
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