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If tan^(-1) 4 + tan ^(-1) 5 = cot^(-1...

If ` tan^(-1) 4 + tan ^(-1) 5 = cot^(-1) lambda " , then find " 'lambda'`

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The correct Answer is:
`lamda=-19/9`
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RESONANCE ENGLISH-RELATION, FUNCTION & ITF-SSP
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  10. Find the value of : sec(cos^(-1)(2/3))

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  11. Find the value of : cosec(sin^(-1)(-1/(sqrt(3))))

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  13. Find the value of : sec("cot"^(-1)16/63)

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  14. Find the value of sin(1/2cot^(-1)(-3/4))

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  15. Evaluate: (i) tan(2\ tan^(-1)1/5-pi/4) (ii) tan{1/2cos^(-1)(sqrt(5))/3...

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  16. If xepsilon(-1,1) and 2tan^(-1)x=tan^(-1)y then find y in term of x.

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  17. Find the value of "cos"(2cos^(-1)x+sin^(-1)x) at x=1/5, where 0lt=pi a...

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  18. Prove that: sin^(-1)(4/5)+sin^(-1)(5/(13))+sin^(-1)((16)/(65))=pi/2

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  19. If tan^(-1) 4 + tan ^(-1) 5 = cot^(-1) lambda " , then find " 'la...

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  20. Find the value of 2cos^(-1)3/(sqrt(13))+cot^(-1)(16)/(63)+1/2cos^(-1)7...

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